Pump particularly for bicycles

ABSTRACT

The present invention is a built-up pump for bicycles. The pump consists of a tank provided with a hose, a cylinder which can be placed in the tank, when not used, or extended above the tank, when used, a piston rod which has a piston on the lower end and can accommodate the hose in its hollow portion. A handle is capable of being fit onto the outside of the tank, when not used, and used as a handle to operate the piston rod.

United States Patent 1191 Ohashi June 25, 1974 [5 PUMP PARTICULARLY FOR BICYCLES 1,316,417 9/1919 Buchanan 417/555 [75] Inventor: Isao Ohashi, Nagoya Japan 1,414,463 5/1922 Grant ..I 417/571 73. Assignee: 01135111 Iron Works (30., Ltd., Aichi, FOREIGN PATENTS OR APPLICATIONS Japan 321,807 11/1929 Great Britain 417/555 [22] Filed: Apr. 19, 1973 Primary Exammer-W1ll1am L. Freeh PP 3 5 Assistant ExaminerGregory P LaPointe [30] Foreign Application Priority Data [57] ABSTRACT May 17, 1972 Japan 47-57745 The present invention is a built-up pump for bicycles. 52 u.s.'c1. 417/234 The PhmP eeheiete of a tank Phwided with a hose, a 51 1111. C1. F04b 21/00 eyhhder whieh he Plaeed in the tank, when 58 Field 01 Search 417/234 235, 238 454-, heed, or extended above the tank, when used, a Piston X'Od has a P1511011 on 11116 lower end and can ac- 92/128 .1 commodate the hose in its hollow portion. A handle is capable of being fit onto the outside of the tank, when [56] References Cit'ed not used, and used as a handle to operate the piston UNlTED STATES PATENTS q 5974226 1/1898 Temple 417/234 1 Claim, 2 Drawing Figures PUMP PARTICULARLY FOR BICYCLES lower end with a piston sliding inside the cylinder and capable of accommodating the hose, and a handle having an inside diameter and capable of being fit to the outside of the tank and formed like a cup with an open-. ing at one end and mountable detachably to the upper' end of the piston rod.

temal wall of the tank 9, providing an air sealing at the part where the hollow .endportion 12 is provided. A.

treadle is swingably mounted on a stand 11 fixed at the lower end of the tank 9. The upper end opening 13 With these and other objects in view which will become apparent in the following detailed description, the present invention will be clearly understood in connection with the accompanying drawing, in which:

FIG. 1 is an axial cross-sectional view of an air pump, designed in accordance with the present invention, in its operative position; and I FIG. 2' is a partly axial cross-sectional view of the pump, shown in its collapsed position.

Referring now to the drawing, the present invention relates to a built-up air pump, useful as an air pump, particularly for bicycles, and equipped with a tank 9 and contained compactly for the convenience of transportation, entirely avoiding inconveniences when in its inoperative position. v

The built-up pump designed in accordance with the present invention, comprises a tank 9, which is equipped attachably and detachably, respectively, with a hose 7 on the lower end portion. A cylinder 3 is provided with a check valve 6 on its lower end and disposed inside the tank 9 or fixable extendedly at the upper end of the tank 9. A piston 4 slides inside the cylinder 3 at its lower end. A hollow piston rod 2 is capable of receiving the hose 7, and a handle 1 has an inside diameter which fits the outside diameter of the tank 9 and forms like a cup with an opening at one end and is mounted detachably to the upper end of the piston rod 2.

Referring now again to the drawing, a seal 8 is provided, which is attached to the hollow end formation 12 formed by the lower end of the cylinder 3 and to the inis provided inside with threads of the tank 9 and screwed onto the hollow end portion 12 of the cylinder 3. A spring 14 presses the check valve 6 to its closing position. A seat 5 for fixing the seal is fixed integrally into the hollow end portion 12. The handle 1 is screwed to or mounted by an engaging member to the upper end of the piston rod 2 perpendicularly thereto.

In operation, the cylinder 3, receiving the piston rod 2, is extendedly connected to the upper end of the tank 9 and the handle 1 is secured to the upper end of the piston rod 2, as shown in FIG. 1. The tank 9 acts as a pressure chamber, facilitating the air pumping operation. Although this pump is equipped with a tank, when it is not necessary, the cylinder 3 is inserted into the tank 9, the hose 7 is then connected with the hollow piston rod 2, and the handle 1 fitsto the outside face of the tank from above as shown in FIG-2, so that the whole equipment is reduced to a small size slightly longer than the tank 9. Accordingly, the pump is accommodated to a small reduced size, when not in use, thus very convenient for transportation and practically very useful.

While I have disclosed one embodiment of the present invention, it is to be understood that this embodiment is given by example only and not in a limiting sense.

I claim:

1. A pump comprising a tank having removably attached thereto a hose at its free end,

a cylinder provided with a check valve at its lower end and sealingly received by and axially movable in said tank,

a hollow piston rod having a piston reciprocating in said cylinder,

a hollow cylindrical handle removably secured to the upper free end of said piston rod and having an inner diameter complementary to the outer diameter of said tank, in order to slide said handle in a coaxial arrangement in its inoperative position, and

said handle having a substantially cylindrical opening receiving the free end of said piston rod in the inoperative position of said pump.

OUNl'l-Eli S'IIA'IZES PATEN OFFICE CEWIIFICA'IE ()F CORREC'llON Dated June 25,- 1974 Patent No.

Isao Ohashi Inventor(s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

On thea'cov er sheet, Item I30] "47-57745" should read 57 745/72 Signed and sealed this 1st day of October 1974,

(SEAL) Attestzf v v MoCOY M. GIBSON JR. 4 C. MARSHALL DANN I Attesting Officer I Commissioner of Patents FORM PO-10 I USCOMM-DC eoave-pes u.s covsmmzm wmmmc. omcz 93 0 

1. A pump comprising a tank having removably attached thereto a hose at its free end, a cylinder provided with a check valve at its lower end and sealingly received by and axially movable in said tank, a hollow piston rod having a piston reciprocating in said cylinder, a hollow cylindrical handle removably secured to the upper free end of said piston rod and having an inner diameter complementary to the outer diameter of said tank, in order to slide said handle in a coaxial arrangement in its inoperative position, and said handle having a substantially cylindrical opening receiving the free end of said piston rod in the inoperative position of said pump. 